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AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy

文献类型：期刊论文

作者Sun, Jingbo7,8; Guo, Hengxiao8; Gu, Minfeng8; Li, Ya-Ping8; Chen, Yongjun8; González-Buitrago, D.5,6; Wang JG(王建国)3,4; Li SS(李莎莎)3,4; Feng HC(封海成)3,4; Xiong DR(熊定荣)3,4
刊名ASTROPHYSICAL JOURNAL
出版日期2025-04-01
卷号982期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/adb724
产权排序第5完成单位
文献子类Article
英文摘要A black hole (BH) can tear apart a star that ventures within its tidal radius, producing a luminous flare as the stellar debris falls back, known as a tidal disruption event (TDE). While TDEs in quiescent galaxies are relatively well understood, identifying TDEs in active galactic nuclei (AGNs) still remains a significant challenge. We present the discovery of AT2021aeuk, a transient exhibiting dual flares within around 3 yr in a narrow-line Seyfert 1 galaxy. Multiwavelength observations triggered during the second flare in 2023 revealed an extraordinary X-ray V-shaped light curve, strongly anticorrelated with the optical light curve and accompanied by a lag of similar to 40 days. This behavior is inconsistent with both supernova and pure AGN origins. In addition, a new broad component emerges in the Balmer lines during the second flare, showing a clear reverberation signal to the continuum variation. We propose that the dual flare may be linked to a repeating partial TDE (rpTDE), where the second flare results from a collision between the TDE stream and the inner accretion disk, triggering an optical flare while simultaneously partially destroying the X-ray corona. However, other mechanisms, such as a stellar-mass BH merger within an accretion disk, could produce similar phenomena, which we cannot entirely rule out. The Vera C. Rubin Observatory will be a powerful tool for further investigating the nature of such events in the future.
学科主题天文学天文学 ; 星系与宇宙学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词ACTIVE GALACTIC NUCLEI ; DIGITAL SKY SURVEY ; EXTREME VARIABILITY QUASARS ; SUPERMASSIVE BLACK-HOLES ; X-RAY-EMISSION ; OPTICAL CONTINUUM ; SPACE TELESCOPE ; ACCRETION RATES ; DISK FORMATION ; LIGHT CURVES
资助项目MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1607903]; MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2022YFF0503402]; National Key R&D Program of China[1247030223]; National Natural Science Foundation of China (NSFC)[018GJHZ2022029FN]; Future Network Partner Program, CAS[178GJHZ2023184MI]; Future Network Partner Program, CAS[NSFC-12473019]; Overseas Center Platform Projects, CAS[JCYJ-SHFY-2021-013]; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch[2022SKA0120102]; National SKA Program of China[CMSCSST-2021-A06]; National SKA Program of China[NSFC-12203096]; China Manned Space Project[202301AT070358]; China Manned Space Project[NSFC-12373070]; China Manned Space Project[NSFC-12192223]; Yunnan Fundamental Research Projects[23ZR1473700]; Yunnan Fundamental Research Projects[NSFC-12333004]; Natural Science Foundation of Shanghai[XDB0550200]; Strategic Priority Research Program of the Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001453726500001
出版者IOP Publishing Ltd
资助机构MOST divided by National Key Research and Development Program of China (NKPs)https://doi.org/10.13039/501100012166[2023YFA1607903, 2022YFF0503402] ; National Key R&D Program of China[1247030223] ; National Natural Science Foundation of China (NSFC)[018GJHZ2022029FN] ; Future Network Partner Program, CAS[178GJHZ2023184MI, NSFC-12473019] ; Overseas Center Platform Projects, CAS[JCYJ-SHFY-2021-013] ; Shanghai Pilot Program for Basic Research-Chinese Academy of Science, Shanghai Branch[2022SKA0120102] ; National SKA Program of China[CMSCSST-2021-A06, NSFC-12203096] ; China Manned Space Project[202301AT070358, NSFC-12373070, NSFC-12192223] ; Yunnan Fundamental Research Projects[23ZR1473700, NSFC-12333004] ; Natural Science Foundation of Shanghai[XDB0550200] ; Strategic Priority Research Program of the Chinese Academy of Sciences
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28235]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun 130117, People's Republic of China
2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100101, People's Republic of China;
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China;
4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, Yunnan, People's Republic of China;
5.Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA 92697-4575, USA;
6.Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 106, Ensenada 22860, BC, México;
7.University of Chinese Academy of Sciences, 19A Yuquan Road, 100049, Beijing, People's Republic of China;
8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China; sunjingbo@shao.ac.cn, hengxiaoguo@gmail.com;
推荐引用方式
GB/T 7714		 Sun, Jingbo,Guo, Hengxiao,Gu, Minfeng,et al. AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy[J]. ASTROPHYSICAL JOURNAL,2025,982(2).
APA Sun, Jingbo.,Guo, Hengxiao.,Gu, Minfeng.,Li, Ya-Ping.,Chen, Yongjun.,...&Zhang, Minghao.(2025).AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy.ASTROPHYSICAL JOURNAL,982(2).
MLA Sun, Jingbo,et al."AT2021aeuk: A Repeating Partial Tidal Disruption Event Candidate in a Narrow-line Seyfert 1 Galaxy".ASTROPHYSICAL JOURNAL 982.2(2025).

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